SC-14: Implement timelock delay for ADMIN_KEY rotation to prevent instant rug pulls

[chinweobtagaz]

Context: Even if an ADMIN_KEY rotation is added, doing it instantly implies extreme trust in the admin.
Location: contracts/game_contract/src/lib.rs
Acceptance Criteria:

• Implement a 24-hour minimum timelock delay for accepting a new admin key.

[PeterOche]

hello, team can i work on this issue ?

[drips-wave]

Congratulations, @fauztech05! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @fauztech05: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

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